Ritterocactus rutilans subsp. veenianus (Vliet) Doweld in Sukkulenty 2(2): 23. 1999 Ritterocactus rutilans subsp. veenianus (Vliet) Doweld in Sukkulenty 2(2): 23. 1999is new combination for Notocactus veenianus Vliet in Succulenta (Netherlands) 53: 171. 1974Taxon for this nameRitterocactus rutilans subsp. veenianus (Vliet) Doweld